Enclosure for a bathtub



FIG. 1 is a top perspective view of a shower enclosure for a bathtub, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a side elevational view, the opposite side being a mirror image thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top perspective view of the second embodiment, showing my new design;

FIG. 7 is a front elevational view thereof;

FIG. 8 is a top plan view thereof;

FIG. 9 is a side elevational view, the opposite side being a mirror image thereof; and,

FIG. 10 is a rear elevational view thereof.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an enclosure for a bathtub, as shown and described. 